Digital time delay relay utilizing logic elements

Details Digital time delay relay utilizing logic elements Digital time delay relay utilizing logic elements

1974-08-29

1976-06-15

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307203, 307252B, 307311, 3171485B, 317141S, 323 22SC, H03K 513, H01H 4718, G05F 140

Patent

active

039639479

ABSTRACT:
Solid-state digital time delay relay having a pair of complementary contacts one of which breaks or opens before the other makes or closes. The switching or transfer function utilizes a light emitting diode in conjunction with a photosensitive resistive element for each set of contacts.

REFERENCES:
patent: 3286030 (1966-11-01), Puckett et al.
patent: 3588540 (1971-06-01), Bohn
patent: 3656005 (1972-04-01), Lee
patent: 3693060 (1972-09-01), Joyce
patent: 3740587 (1973-06-01), Lee

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